B: the Indus and Ganges River
im pretty sure its B and if u get it wrong sorry
B is definitely correct as I recently did a lesson on it but I am not sure about the others, sorry.
A.
The answer is A.) The British lost.
It was primarily the "b. formation of the Vietcong in Vietnam" that led the Truman administration to expand the containment doctrine to include Asia, since this was seen as a threat to democratic principles in the west as well.